61 #define POSIX_CALL(call)   do { if ((call) == -1) goto error; } while (0)  macro
460         POSIX_CALL(close(p2cwrite));  in child_exec()
462         POSIX_CALL(close(c2pread));  in child_exec()
464         POSIX_CALL(close(errread));  in child_exec()
465     POSIX_CALL(close(errpipe_read));  in child_exec()
470         POSIX_CALL(c2pwrite = dup(c2pwrite));  in child_exec()
477         POSIX_CALL(errwrite = dup(errwrite));  in child_exec()
492         POSIX_CALL(dup2(p2cread, 0));  /* stdin */  in child_exec()
499         POSIX_CALL(dup2(c2pwrite, 1));  /* stdout */  in child_exec()
506         POSIX_CALL(dup2(errwrite, 2));  /* stderr */  in child_exec()
512         POSIX_CALL(chdir(cwd));  in child_exec()
522         POSIX_CALL(setsid());  in child_exec()
527         POSIX_CALL(setgroups(groups_size, groups));  in child_exec()
532         POSIX_CALL(setregid(gid, gid));  in child_exec()
537         POSIX_CALL(setreuid(uid, uid));  in child_exec()